No power after 3000 rpm, Like it's not getting gas Options

[tod914]

Tach bouncing up and down with the hesitation? My pertronix did that when it was on it's way out too. I'd step on the gas and nadda.

[swl]

if the fuel pressure is dropping when the performance is dropping it really looks like you have a constriction or the pump is dieing. Most likely of course is a constriction. You've done the back end. Time to get to the front. You probably need to do the front fuel lines anyway so get the tank out and inspect it too. There is a mesh filter sock inside the tank on the supply line. They get gunked up over the years.

Thats not necessarily a slam dunk fix all solution but it is work that should be done anyway. You won't be wasting your time.

[silverteener]

I replaced the cap and rotor last night and it didn't change anything but it was worth a shot. I'm also going to put the points and condenser back on to see if its my Petronix. I did notice 2 of my injector hoses are slightly kinked. Is there a source to get these already shaped? I tried the ones from AA before but they didn't work for me. I'm still going to get the tank cleaned and replace the front fuel lines. Can the mesh fiilter sock be cleaned or will I need to get a new one? My dad is also trying to find another fuel pump. I was able to drive it to work today! I just can't rev it up over 3000 rpms without problems!

thanks

Scott

[silverteener]

I checked the front fuel lines today. Actually I pulled on one and a half a tank of gas started flowing out (IMG:style_emoticons/default/blink.gif) Once it was finally empty I got the tank pulled. What I found was a lot of rust! I could not believe how bad it was (IMG:style_emoticons/default/new_shocked.gif)


So now I either need to figure out how to clean it or try to find a new tank. I think this might fix my problem. Any suggestions on how to clean a tank. I'd rather not spend the money on another one!

Thanks

Scott

[naro914]

You can take it to any place that fixes radiators. They will steem clean it out, then coat it with a sealant. Got mine done years ago.

FYI, I have an extra tank in pretty good shape - small amount of discoloration on the inside but no real rust or anything - that I'll sell for cheap if you want.

[swl]

DIY alternative - http://www.por15.com/FUEL-TANK-REPAIR-KIT/productinfo/FTRK/ Probably would not save you much over having a rad shop do it for you. Rad shop also saves you having to dispose of the used chemicals.

Think about Bob's offer. All that rust came from someplace - you may have some thin spots.

[charliew]

Be sure you check the job the radiator shop does and tell them you want it all coated and that you will be using a mirror to check it out. They sometimes miss some spots and you can't tell unless you really want to know if it's a good job. If it's done right it should be forever. Restomotive has a great sealer but the prep is the real killer.

[silverteener]

I finally got my tank put back in over the weekend but it still doesn't run right. I'm going to put the points and condenser back on and see if that fixes it. My dad still thinks the fuel pump is not keeping up. (IMG:style_emoticons/default/confused24.gif)

[SLITS]

All you have to do is hook a pressure gauge into the fuel rail and start reving the engine. If the fuel pressure drops from the target of 30 psi ... the fuel pump is on it's way out.

[silverteener]

My old pump that was working before the engine was rebuilt started leaking when we put it back in. I found a used pump that we put in but I don't know how well it worked. I also have a pump that I know doesn't work so last night I took my good pump apart and replaced the O'rings with the ones from the pump that didn't work. I was surprised how much they had shrunk! anyways. I put the pump in and I can hear it run but the car won't start. I'm either really low on gas(which I am) or the pump isn't working right. I'm going to get more gas today and see if it will start. I put the tank back in and only put maybe 3 gallons it in. then I had it jacked up on the right side so I'm hoping it just wasn't getting fuel. Hopefully!

[TravisNeff]

Is there a possibility that the fuel pump hoses are backwards, meaning you are supplying fuel on the return side of the fuel loop?

[silverteener]

I rechecked them last night and seemed fine. I have the line from the tank on S. The return line on R, and the line going to the fuel pressure regulator is D. I think!

[TravisNeff]

You have the orientation at the pump correct, but what I am referring to is from the "D" port you then supply fuel to the rails, and the last piece of hardware that fuel goes through before returning to the pump is the fuel pressure regulator. What I mean to say - is it possible that you have your "R" and "D" hose hooked up backwards?

[SUNAB914]

Change that pertronix back to points! Let us know.

[r_towle]

car is silver...that is the problem

[naro914]

did you ever go back and check all the electrical stuff? coil, ignition, pertronix (as SUNAB914 said).

[silverteener]

I still need to pick up a set of points but everything else is ok.

I know before when I checked the fuel pressure while driving it would drop well below 20. I have it set at 29. If SLITS is correct then I would think it is the pump. After I get it running again and if the pump didn't fix it my next move is to go back to points. I will definitely try points before getting another fuel pump!

And......


Silver is the best color for these cars (IMG:style_emoticons/default/aktion035.gif)

[rjames]

if the fuel pressure is dropping when the performance is dropping it really looks like you have a constriction or the pump is dieing.

(IMG:style_emoticons/default/agree.gif)

You said the tank was full of rust. Did you put in a new fuel filter too? It would undoubtedly need changing if your tank had rust in it. Also make sure your fuel lines are clear and not crimped under the tank.
I'm betting the little knowledge I have that it's your fuel pump.

[silverteener]

CONSTRICTION!!

That was the final problem. Initially I think the tank was just so full of rust that it wasn't getting enough fuel. Then when I put the tank back in I made the new hoses the same length as the old ones. Well when I put it back in one kinked. I thought they were ok but last night I rechecked them and one was kinked real bad! I shortened them up and put it back it and today it runs great (IMG:style_emoticons/default/piratenanner.gif)

Thanks everybody for all your suggestions. It would probably still be sitting on jack stands without your help (IMG:style_emoticons/default/beerchug.gif)


Now its time to go for a drive (IMG:style_emoticons/default/driving.gif)


Thanks again

Scott

[SUNAB914]

Congrats! Keep motoring and thanks for letting us know.